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Hall effect switch

Hall effect switch

Hall effect switch

(OP)
I am trying to build a switching circuit using a hall effect switch that runs on 2.5V.

I currently use a reed switch which connects two wires when a wire is passed near the switch.  Using the hall effect switch would prevent me from having to replace broken switch, or ones that have over time become magnetized and therefore "normally closed" instead of normally open.  Can anyone help? Thanks

RE: Hall effect switch

For someone that doesn't do Hall Effect work regularly, it is not at all obvious that there are devices that work from such a low voltage. I was surprised to find a complete unit at http://www.melexis.com/Sensor_ICs_Hall_effect/Hall_effect_Bipolar_Switches/Bipolar_Hall_Switch_-_Low_Voltage__Very_High_Sensitivity_145.aspx

It works from 2.2 V.

Gunnar Englund
www.gke.org
--------------------------------------
100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...

RE: Hall effect switch

I doubt that the switch is becoming magnetized, its more likly that inrush currents are welding the switch closed.
Have a look at some reed switch makers websites for what you should avoid when using reed switches, one no no is capacitance across the switch or the switched load.

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